Pulverizing machine



y 15, 1930- w. J. ARMSTRONG PULVERIZING MACHINE Original Filed April 28, 1927 V tools, bolts, nuts, etc.

Patented July 15.1930 1 WALTER J.

earner sacrnnrne CQMEANY, or oonnrasiis, 93110, a. oonronari'on or OHIO ru'nvnnrzrne MACHINE Application filed April 28, 1827, Serial No. 187,400. Renewed October 3,1192%).

machines of the class wherein a rotor is adapted to rapidly revolve withina casing toen- 5 gage and pulverize material therein.

In the use of machines of the class referred to, difiiculty has arisen from the accidental inclusion with the material to bepulverized of unbreakable fragmentssuch as metallic Safety devices have heretoforebeen provided wherein, by the excessive strains occasioned by contact of the rotor withsuch unbreakable objects, the actuating power devices areautomatically disconnected from the rotor thereby preventing further injury to. the machine. These devices have been unsatisfactory because of the shocks and strain arising from the inertia of the rotor and the time required for the action of dental strains above described.

These and other objects will appear in the following specification reference being had to the accompanying drawings of which Fig. 1 is a side elevation of a machine built in accordance with my present invention.

Fig. 2 is an elevation of the end of the machine illustrated in Fig. 1 remote from the power connection whereby the machine is actuated.

Fig. .3 is an elevation of the power end of the machine illustrated in Figs. 1 and 2. i Fig. 4; is a transverse sectional view taken along the line lV-IV of Fig. 1.

Fig. 5 is a fragmentary detail on an enlarged scale of certain parts shown in Fig. 4. Like numerals refer to similar parts in the several figures.

The preferred embodiment of -my invention comprises a base frame 1 of generally to cause the revolution of the rotor.

rectangular form upon which are mounted the operative parts of the machine. At each end of the frame there are formed brackets 2 to which are attached the journal bearings 3.

Mounted in thejournal bearings 3 is a longitudinallyextending shaft l upon which the rotor is mounted. The rotor is of the Well known typecomprising a plurality of concentric discs'5' arrange'din spaced relation longitudinally of the shaft 4, and between these discs are mounted the pulverizingelements. Thepulverizing elements are prefer- Anias'rnone. or. comments, or-r'ro, Assrenon To rrrnzrnrrnnr imnu f ff ablyof trifoliate form having diverging arms 6 7 and 8, each ofwhich is perforated to receive the supporting rods 9. The rods 9' extend longitudinally of the rotor through suitable apertures of the discs 5,and the proportionof the parts are such that two of the arms 7 and 8 engage the rods 9 to hold the third arm 6 rigidly in radial projection be;

yond the periphery of the discs 5; 1 Fixed to the projecting end 10 of the shaft 4; is a hub 11 upon the periphery of which'is rotatively mounted a pulley wheel 12 adapted to engage an endless belt, not shown'in the drawing, by which power is transmitted The pulley 12 is connected 'with'the hub 11 by one or more shear pins 13 which extend through suitably placed apertures in the web 14c of the.

pulley 12 and in a circumferentially extend ing flange 15 of the hub 11 The shear pins 13 are formed of suitable frangible material and their proportions are such that a strain in excess of a definitely predetermined maximum will cause them to shear and thereby disconnect the pulley from the rotor to prevent injurv of the machine arising from overloads such as'would be occasioned by the engagement of unpulverizable objects accidentally included in the material which is to be pulverized,

- .Attached to the upper edges ofthe base frame 1 are the end walls 16 of'the pulverizingrhamber. and at their upperv forward corners these end walls are 'connected'together by a through bolt 17. Suspended from the bolt V1'? is a breaker plate 18 which extends between the end walls'16 and constitutes the forward wall of the pulverizing from the spirit chamber, of a rotor rotatable within the chamber, breaker Jplate pivotally-mormted adjacent the rotor adaptedto' cooperate there} with to pulverize? material fed thereto, an abutment positioned behind said 'br aker plate, a spring interposed between said abutment and said breaker plate, said abutment being attached to said casing by means re-U loasable by predetermined vpressure upon the breaker plate asand for the purpose set forth.

2.111 a pnlveri-aing machine, the combination with aenclosinga'pulverizing chamber, of rotor rotatable within the chamber, a breaker plate positioned at the forward side of said chamber pivotally supported at one end and adapted to cooperate with said rotor to pulverize material fed.

thereto, an arm position d behind said breaker plate pivotaliy attached to said casing at its end adjacent the pivot point of said plate and resiliently connected to the breaker plate,

and means to secure the other end the arm to the casing and for the purpose set forth.

3. In a pulrerizing machine, the combination with a casing enclosing a pulverizing chamber, of a rotor rotatable within the chamber, a breaker plate positioned at the forward side of the chamber pivotally suppo t d at one and adapted to cooperate wi ne rotor to pniverise material fed thereto, an arm positioned behind said breaker plate pirotally attached to said casing at its end acent the pivot point of said plate and resilien ly connected to the breaker plate, and means ixleasable by a predetermined pressure upon the br aker plate to secure the other end of said arm to the casing as and for the purpose set forth. I V I s V In a pulverizing machine, the combination with a casing enclosin a pulverizing chamber, of a rotor rotat-a le within the chamber,a breaker plate positioned at the forward side of said chamber pivotallysupported one end and adapted to cooperate wi h said rotor to p-ulverize material fed thereto, an arm positioned behind said breakor plate pivotally attached to said casing at its end adjacent the pivot point of said plate, means releasable by a predetermined pressure upon the brea er plate to attach the other end of said arm to said casing, and a spring interposed between said arm and said breaker" plate as and for the-purpose set for en.

5. In a pulverizing machine, the combination with casing enclosing a pulverizing chamber, of a rotor rotatable within vthe chamber, a'breaker plate positioned at the forward side of said chamber adapted to cooperate with said rotor to pulverize material fed with thereto, means releasable by predetermined pressure nponsaid breaker plate adapted to resiliently hold said breaker plate in opera tive relation with said rotor, means to actuate the rotor,-and means releasable by a pre determined resistance to rotation of the rotor adapted to connect said actuating means v Shil'il rotor 'as'and for the purpose set forth.

.6. in a pnlverizing machine, the .comblnation with a, casing enclosing a pulverlzlng .-chamber,- ofa rotor rotatable Within the chamber, a breaker plate positioned at the forward side-of the chamber adapted tocooperate with said rotor to pulverize material fed thereto, an abutment behind said breaker plate, a spring connectingsaid abutment with said breaker plate, means includmg a franglble element adapted to attach said abutment to said casing, power devices adaptedito actuate said rotor, and .means including a frangible element adapted to;con-' nect said power devices with said :rotor as and for the purpose set forth.

7. In a pulverizing machine, the combination with casing enclosing the pulverizing -chamber, of a rotor; rotatable Within the chamber, abreakerplate positioned atthe forward side of said chamber pivotally supported at its upper end andvaidaptedto coopcrate with said rotor to pulverize' material fed thereto, an arm positioned behind said breaker plate pivotally attached to said'cas ing at its upper end andresiliently connected with said breaker plate, and ad ustable means to secure the lower endof said arm to thecas- 1 ing as'and for the purpose set'forth.

In a pulverizing machine, the coinbination w th a casing enclosing the pulverizing chamber, of a rotor rotatable within the chamber,a breaker plate'positioned at the forward side of the chamber pivotally supported at one end and adapted to cooperate with the rotor to pulverize material fed thereto, an arm positioned behind said breaker "plate'pivotally attached to said casing at its end adjacent the pivot pointof said plate and adjustably resiliently connected to the breaker'p'late, and means releasable by a predetermined pressure upon the breaker plate to adjustably secure the other end of said arm to the casing as and for the purpose set forth.

9. In a pulverizing machine, the combination with a casing enclosing the pulverizing chamber, of a rotor rotatable within the chamber, aibreaker plate positioned at the forward side of the chamber pivotally supported at its upper endand adapted to cooperate with said rotor to pulverize material fed thereto, an arm positioned behind the T reaker plate pivotally attached to said casing at its upper end, means releasable by a predetermined pressure upon the breaker plate to attach the lower end of said arm to the casing, a spring interposed between said too as and for the purpose set forth.

10. In a device of the class described, a rotor, a breaker plate for cooperation therewith, means to maintain said breaker plate in constant operative relation to said rotor under normal working conditions, said means being adapted to yield to permit the passage of small unbreakable particles between the rotor and plate, and means entirely releasable to permit the movement of the plate to inoperative position relative to the rotor upon the entrance between the two elements of larger ubreakable fra ments.

11. In a pulverizing machine. arotor, at breaker plate for cooperation with said rotor, an abutment behind said breaker plate, cushioning means between said abutment and said plate, means for altering the distance between said abutment and plate to regulate said cushioning means, and means for moving said abutment to adjust said plate relative to said rotor.

12. In a pulverizing machine. a rotor, a breaker plate for cooperation with said rotor. an abutment behind said breaker plate, cushioning means between said abutment and said plate, means for altering the distance between said abutment and plate to regulate said cushioning means, means for moving said abutment to adjust said plate relative to said rotor, and means yieldable at a predetermined pressure for securing said abutment in determined position relative to said rotor.

13. In a pulverizing machine, a rotor, a breaker plate pivotally supported in operative relation to said rotor. an abutment member extending across and behind said breaker plate, said abutment member being pivotally mounted at one end, cushioning means between said abutment member and said plate, adjustable means connecting said abutment member and said plate for altering the distance between them and thereby regulating said cushioning means, and adjustable means for securing the other end of said abutment member with said plate in adjusted position relative to said rotor.

14:. In a pulverizing machine, a rotor, at breaker plate pivotally supported in operative relation to said rotor, an abutment member extending across and behind said breaker plate, said abutment member being pivotally mounted at one end, cushioning means between said abutment member and said plate, adjustable means connecting said abutment member and said plate for altering the distance between them and thereby regulating said cushioning means, and adjustable means for securing the other end of said abutment member with said plate in adjusted position relative to said rotor, the mounting means for said abutment member including means frangible at a predetermined pressure.

15. In a machine of the class described, a rotor, a breaker plate for cooperation with said rotor, an abutment plate, a compression spring interposed between said plate and abutment, a bolt and nut for adjustably limiting the action of said spring, and means operable to adjust the abutment and therewith the plate toward and away from the rotor.

16. In a machine of the class described, a rotor, a breaker plate for cooperation with said rotor, an abutment plate, a compression spring interposed between said plate and abutment, a bolt'and nut for adjustably limitin the action of said spring, and means frangible under predetermined stress for securing the abutment in adjusted position.

In testimony whereof I have hereunto set my hand.

WVALTER J. ARMSTRONG. 

